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Unsteady Periodic Boundary Condition

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Old   July 24, 2014, 16:16
Default Unsteady Periodic Boundary Condition
Eduardo Molina
Join Date: Sep 2010
Location: Brazil
Posts: 35
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Hi Su2 users and developers.

I am having problems in setting periodic boundary conditions. I am trying to simulate 3D circular cylinder using URANS and DES (please see the other topic of Hybrid RANS/LES) with periodic boundary conditions in the spanwise direction.

I started with a 2D mesh and extrude this grid inside ICEM-CFD, so the nodes perfectly match in spanwise and export it in CGNS format. When I configure this 2 BC in spanwise using symmetry BC the code runs smoothly, but when I configure with periodic BC I have some non-physical points and the code diverges.

I tried to run SU2_PBC first, making the following change on cfg file:
MARKER_PERIODIC= ( SYM1, SYM2, 0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 4.0, SYM2, SYM1, 0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, -4.0 )

The console output is:
-------------------- Setting the periodic boundaries --------------------
Setting the periodic boundary conditions.
Checking SYM2 boundary against periodic donor, SYM1.
Checking SYM1 boundary against periodic donor, SYM2.
Number of new points: 30584.
Number of new interior elements: 30252.
Number of new boundary elements added to preexisting markers: 664.
Segmentation fault

Note that SYM1 BC is located at Z=0.0 and SYM2 BC is located at Z=4.0.

SU2 can run with unsteady periodic BC or I am doing something wrong?
I appreciate any tips/help from the community, I also can attach a link to the 3D mesh and cfg file.


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